Dumping grate for stokers



G. HJHACHER, JR. DUMPING GRATE' ron STOKERS.

- APPLICATION FILED DEC. 23, 1920.

Patented Nov. 21, 1922.

L d0 1 Gwen/mugs Fra Patented Nov. 21, 1922.

' ETED. "ST

GEORGE HORNELL mmune, m., or NORTH PROVIDENCE, RHODE ISLAND.

DUMPING GBATE FOB STOKERS.

Application filed December 28, 192-0. Serial No. 433,669.

To all whom it may concern:

Be it known that I, GEORGE H. TEACHER,

Jr., a citizen of the UnitedStates, residing I at 1546 Smith Street, North Providence, in

the county of Providence-State of Rhode Island,have invented certain new and useful Improvements inv Dumping -Grates for S-tokers; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains, to

.,make and use the same.

My invention is an improvement in dumping'grate for stokers of thecharacter set forth in my Patent No. 1,302,453, granted 1 April 29,1919, and thepresent application is a continuation in part of my prior application, Serial No. 353,423

-stoker forming the subject-matter of the above mentioned patent, wherein means is provided in connection with the structure for facilitating the repair thereof and for permittingthe easy. removal andreplacement of parts of the structure which may become .brokenor otherwise damaged.

In the drawings,

Figure 1 is a vertical section of the grate structure,

Figure 2 1s a view similar to Figure 1, but with the various detachable elements removed. ,l

Figure 3 is; an elevation of one of the detachable grate. sections,

Figure 4 is top plan view of the same,

. Figure ,5.- is a section taken along the line 5-5 of Figure 3, y 1

Figure 6is asection along the line 6-6 of Fi re1,-

' igure 7 is a perspective view looking from above showing a method of attaching the operating mechanism.

The improved dumping grate consists of Figures 3 and 4. Each of these grate sections is T-shaped in cross section, the body portion of the T forming a grate surface 5 for supporting the fuel, while the stem ofthe T isa fin depending from the center of the gratejsurface and having transverse holes or openings 7 for 'a purpose to'be presently described. The forward end of the grate surface of each section is adapted to rest upon the upper edge of the curved shield 2, and referring to Figures 1 and 2 it will be seen that this edge is bevelled to fit the under face of the grate surface, which is curved upwardly at the forward end of the section. The other end of the grate surface of the section rests on the crossbar 3, and it will be noticed referring to Figure 2, that the upper edges of the curved shield, and of the crossbar 3 are depressed below the upper edges of the side members 1 of the frame, so that the upper faces of the grate section are flush with the upper edges of the side members.

The grate sections are held in placein the frame and on the shield and crossbar by means of a rod 8, which is passed transversely through openings 9 in the side members, and through those openings of the series 7 of the fins which register with the openings 9. Nearits ends the rod 8 has openings through'which' are passed cotter pins 10 to prevent longitudinal movement of the rod. Referring to Figures 4,v and 5,

it will be noticed that the grate surface of each grate section has on each edge'a series of notches 11 which provide apertures through which the fine material formed by combustion my pass.

In order to permit the connection of mechanism forlrocking the grate with the grate, I provide openings 12 near the lower edge of the curved shield, and preferably near the center thereof, for receiving bolts 13 which connect a lug or arm 14 to the curved shield. This lug is notched or rabbeted to receive the curved shield, and the bolts 13 are engaged by nuts 15 to rigidly connect the parts together. It will be noticed referring to Figure 2 that the openings 12 for the bolts 13 are reamed on the outer face of the shield, to receive the heads of the bolts, in order that the said heads may be flush with the convex surface of the shield. This arm or lug 14 has an opening at the end remote from the shield for connection with a rocking mechanism of the character set forth in my ve mentioned pri r p tent Ea h of the side members 1 of the frame has intermediate its ends an outwardly extending trunnion 15, by means of which the grate may be mounted in the stoker. 1 I

In Figure 7 there is shown a grate in which the lug or arm 14 or-connection with the rocking mechanism is dispensed with.

In this arrangement the grate comprises the.

side members 16, the curved shield 17, and the crossbar 18', butintermediate the: side members the-crossbar andthe shield are 0011- nected by an integral bar "19 which corresponds: in general outlineto the side memher 16, 'but whose upper edge is flush :with "the-tops of the crossbar 18 and the shield-17. "The rocking =mechanism?for the grate is-con- "nected with the body rota yoke QOwhose :garms engage opposite sides of the ban-19,

-' flablyconnected therewith, the frame= com 1 "cross-section each comprising a? grate su-r-" I and are pivoted thereto "as indicated at 21. i It is preferable in manywrespectsthat the "attachment; of the rockingimec hanism be in rear of the pivot mounting 'of the 1i Agrate structure comprisinga substantiallyrectangular open frame, andgra-te sec- 1 tions seated within the frame and detachprising side'members connected at' one end -by a curved perforateshield'iandat the other by a crossbant-heside members having trunnions wherebys'to rocka bly :mount the frame,- the grate sectionsbeing Tshaped in crosssection, eachfeomprising a grate surface and a depending fin, the detachable connection between the: grate sections and the framecomprising'a rod, the and the side members of:th'e frame having registering openings "for receitingthe rod, and said sections resting at their ends""on the curved "shield and on" the crossbar; 2. A? grate structure compr'isinga s'ubstair tially rectangular openframe, and gratesec- U tions seated withinthe frame and detach- ,abl-y connected rtherewith, the fraine :com-

prising side members-connected atone end wby a curved perforate shield and at the -otherby a crossbar,the side members having trunnions whereby to rockably mount: the frame, the gratensectionsbeing T shaped'in faceand a depending t grate instead ofin front 8.8111 F gure 1.

nection between the grate sections and the frame comprising a rod, the fins andzthe side members of the frame having registering openings for receiving the rod, and said sections resting at their ends on the curved shield and on the crossbar, the grate sections having the edges of the grate surfaces serrated. a

3. A grate structure comprising a substantially rectangular open';"frameyl-and grate sections seated Within' the frame, the frame consisting of side members provided with trunnions' and connected {at "one endby a curvedperforate shield and at the other by "a crossbar, theg'rate sections resting at their ends on the shieldahd on the crossbar', the said sections-covering the *upperedge of the shield and forming a g'uard therefor to .pre-

vent burningmfthe said edge, the seetions being 'detachably' connected with the frame, said frame havinga barfintermediateythe side members for connecting the' grate structure with rocking mechanism:

b'ers provided with trunnions and connected atone' end a curved shieldandiatthe other-"end by a bar-,aplurality o fgrate' sec- "tions, each *composed'of avertica'l rib pro- A grate structure comprising sidefinemvided "with apertures,- and "grate surface at'the top of and perpendicularto the plane of" the iib, and having a flat portion supported at one end upon the bar and a curved portion supported at its otheriend 'upon the -upper -edge oi the'shield and coyering saidedge" and forming a guard therefor,[said grate surface": being provided Witlr' notches alOlIg each edge, and means passingthrough tl'ie 'side' members and "the apertures, in" "the ribs of the grate sectionsforholdingfthe latter in place in the structure. I 7 -51. A gratestructure compris ng a'jframe composed of s de members connected atone I end 1 by 5 a crossbar and at the" other by a "curved shield, the side members having t 'runnions whereby the frame may be mounted to "rock,andgrate sections detachably held in the frame and lapping upon the upper ed ge of theshieId tofprovide for expansionand *contractiomand to "a'ct 'as a guard for the" said edge.

Intesti mony whereofl signature. he detachable con- Y GEORGE nonnsir reAcuEajJr. 

